Lock.



LOCK.

APPLICATION FILED -0CT. 3.18

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LOCK.

earner.

Specification of Letters Patent.

Patented Apr. 2,1918.

Apfinatio an heater 2, i917. serial in). 154,452.

To all whom it may concern:

Be it known that I, Marrno TAMBURINI, a subject of the King of Italy, residing at Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Locks, of which the following is a specification.

The object of this invention is to provide a key adapter for looks which shall be so constructed and adapted to be assembled with the look as to be simple and inexpensive in itself and require the most trifling change in the lock in order to accommodate the adapter therein. My invention contemplates the user possessing two or more different adapters for each lock, the same being formed as the complements of as many different keys, so it is also an object of my invention that the adapter be constructed so that the removal of one adapter to substitute another may be readily and quickly effected upon removing the lock and its cover plate.

In the accompanying drawing, in which the invention is fully illustrated,

Figure l is a plan of a lock with a part of the case broken away to show the adapter;

Fig. 2 is a vertical sectional view of a fragment of the lock in the plane of the key, which is shown in place therein, the section being on line 22, Fig. 1; 7

Figs. 3 and 4 are front and side elevations of the adapter; and

Figs. 5 and 6 are similarviews of a modified form thereof.

The lock shown, of a well-known construction, has its case including the parallel main walls a and b, the latter of which is removably held in place by the screw 0, and the marginal wall d between walls a and b and integral with wall a. Each walla b has the usual hole 6 to receive the key 7 which is adapted to turn therein and has the ward extension g.

h is the sliding bolt and a" the pivoted spring-held tumbler adapted to engage with the bolt and hold it at each of its extremes of sliding movement; the bolt and tumbler are adapted to cooperate with any key suited thereto in the usual way.

The key-holes e are arranged in the lower part of the lock case, as usual, and parallel with the axis thereof in the lower part of the marginal wall d is formed a slot j which extends from the front edge of said wall more or less to the wall a, being directly beneath said holes.

70 is the adapter. This in its preferred form is a block having a front-to-rear hole Z conforming in shape to the crosssection of the key in its ward-including portion and a slot, transverse to said hole and designated m, having wards 1?. making such slotthe complement of the key shown in the drawing. The block, which is preferably rectangular in horizontal section, fits between the walls a b of the case, being removable upon removing wall Z) and it has a slidin engagement with the case thus: Its basal portion 0 has opposite lateral front to rear grooves g) of the same width as the thickness of the marginal wall (Z and leaving between them a neck 9 of the same width as the slot j, so that the block may be snugly fitted to the slotted portion of said marginal wall, as shown in Fig. 1.

The construction is such, it will be obvious, that the user can, upon removing the look from the door or the like and then removing its cover wall Z), quickly and readily apply the adapter or remove the one already in place and substitute another having a slot m formed with its wards in a different arrangement and therefore adapted to cooperate with a different key, or simply reverse the adapter so that the lock would be no longer operative with the key entered from the same side of the look as before.

It will further be obvious that in order to apply the adapter to any lock already in use it is only necessary to form in the lower part of its marginal wall the slot j, which may be readily done with a file or the like.

In the modification of the adapter shown in Figs. 5 and 6, it is formed so as to receive a key 9 whose ward extension is slotted; that is, the adapter 9 is without a slot to receive the key, and it has wards s on each side thereof, being otherwise substantially the same as the adapter first described.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is:

1. In combination, with a lock-case having means to receive and support a rotary ward-key, key-operated locking means arranged in the lock-case, and a removable adapter having a sliding interlock with the case parallel with the key axis, and arranged adapter having a sliding interlock with the marginal Wall parallel With the axis of said 10 hole and arranged between the parallel Walls in controlling relation to the path of the wards of a key fitted to said key-hole, one of the parallel Walls being removable.

In testimony whereof I aflix my signature.

MATTEO TAMBURINI.

in controlling relation to the path of movement of the key in the case.

2. In combination, the lock-case having parallel Walls and a marginal Wall between the parallel Walls and also having a key-hole in one of the latter walls adapted to receive a Ward-key, key-operated locking means arranged in the lock-ease, and a removable Copies of this patent may be obtained for five cents each by addressing the Gommissioner of Patents, Washington, D. G. 

